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At least 1,297 records · Page 72Linked to original sources
PubMed2001

Localization of first permanent molars in lateral cephalometric and panoramic radiographs from early mixed dentition to early permanent dentition.

Changes in position and mesiodistal angulations of maxillary and mandibular first permanent molars from early mixed dentition to early permanent dentition were measured on panoramic radiographs and compared with the values measured on lateral cephalometric radiographs. It was found that the maxillary and mandibular first permanent molars were uprighted gradually, drifted mesially and vertically, and that the changes in mesiodistal angulations were clearly on the panoramic radiographs in comparison with the cephalometric radiographs.

Analysis of Variance↗
PubMed2005

Maxillary first permanent molar impaction. A conservative treatment approach.

The objective of this clinical case is to suggest a treatment approach for impaction of the maxillary first permanent molars. This approach allows access to the partially erupted tooth for orthodontic bonding and utilization of loops for distalization. An important detail is the non inclusion of the primary second molar in the orthodontic mechanics, in order to reduce the risk of early loss and preserve this tooth until exfoliation.

Child↗
PubMed1979

The infrabony pocket and its relationship to trauma from occlusion and subgingival plaque.

The role of trauma from occlusion and subgingival plaque in the pathogenesis of the infrabony pocket as observed in the radiograph was studied in 48 teeth which had to be extracted because of advanced periodontal disease. Prior to extraction the teeth were examined with regard to the degree of mobility and the direction of the horizontal components of the masticatory forces. Following extraction, the teeth were stained and examined under the stereomicroscope. When the tooth is adequately stained, the subgingival plaque and the remaining attachment fibers can be distinguished easily from the area of the junctional epithelium. The observations which were made on the extracted teeth were then correlated with what could be seen in the radiograph. The following major observations were made: In the depth of the infrabony pocket there was a close congruence between the front of the subgingival plaque and the borderline of the remaining attachment fibers, the distance varying between 0.2 and 2.0 mm. There was also a close relationship between the front of the subgingival plaque and the alveolar crest adjacent to the tooth as well as between the surface of the subgingival plaque and the opposite vertical wall of the infrabony pocket, the distances ranging between 1 and 3 mm. The horizontal forces were mainly or exclusively oriented bucco-lingually, whereas the infrabony pockets were located mesially or distally, i.e. parallel to the direction of the force and not at a right angle to it as observed in experimental studies. The mobility of the teeth adjacent to which infrabony pockets developed was normal in 42% of the cases, slightly increased in 31%, and only in 11% of the cases was it excessively increased. In 19 cases the infrabony pocket was located on one of the roots of lower molars which were removed by hemisection. In eight of the 12 cases, which were observed for periods from 1 to 10 years, the remaining root functioned well without further development of angular bone defects or infrabony pockets. All of them became markedly firmer as a consequence of successful periodontal treatment. Three of the four remaining roots were extracted because of periapical problems. There was no evidence to indicate that trauma from occlusion had been involved in the pathogenesis of the infrabony pockets.

Adult↗
PubMed1997

Pathologic migration of anterior teeth in patients with moderate to severe periodontitis.

The purpose of this study was to determine the prevalence of pathologic migration of anterior teeth in patients with moderate to severe periodontitis. The correlation between pathologic migration of anterior teeth and attachment loss (AL) was investigated, and an attempt was made to identify the most common early form of pathologic migration. Prevalence of tooth migration was studied in a group of 343 patients with moderate to severe periodontitis before treatment. The presence of pathologic migration was determined from the chief complaint and patient awareness o tooth movement in the last 5 years. Forty-four patients (age range 18 to 69; mean = 48.75) with 75 pairs of migrated and non-migrated teeth were studied further to determine if there is a correlation between severity of periodontal AL and pathologic migration. Migrated teeth were compared to control contralateral teeth that did not have migration. In addition, tooth mobility of the anterior teeth on 36 of the 44 patients was measured using the mobility meter. It was anticipated that tooth mobility would follow the same pattern as AL in relation to pathologic migration. The type and severity of displacement was recorded for each tooth affected by migration. The types of pathologic migration recorded were diastema, extrusion, rotation, facial flaring, and drifting into edentulous spaces. Pathologic migration prevalence was 30.03% +/- 2.5 (103/343 subjects). The mean AL of migrated teeth (4.79 +/- 0.28 mm) was significantly greater (P < 0.0001) than control teeth (3.21 +/- 0.18 mm). The numeric values (called PTV) of migrated teeth (17.6 +/- 1.5) were significantly greater (P < 0.0001) than control teeth (9.4 +/- 1.1). It was difficult to identify a primary form of displacement, as most patients demonstrated a combination of movements. The percentage of the 44 patients who presented with a specific type of movement was: facial flaring (90.9 +/- 4.4%), diastema (88.6 +/- 4.8%), rotation (72.7 +/- 6.8%), extrusion (68.2 +/- 7.1%), and tipping (13.6 +/- 5.2%). The results of this study confirms clinical impressions that periodontal disease destruction of the attachment apparatus plays a major role in the etiology of pathologic migration.

Adolescent↗
PubMed2001

Successful periodontal maintenance of a case with Papillon-Lefèvre syndrome: 12-year follow-up and review of the literature.

BACKGROUND: Various approaches to treating the periodontal condition associated with Papillon-Lefèvre syndrome have been reported. These include oral hygiene instruction, use of mouthrinses, frequent debridement, multiple antibiotic regimens, periodontal surgery, extraction of hopeless teeth, and extraction of all deciduous teeth. Because Papillon-Lefèvre syndrome is rare, most publications are case reports, and very few document long-term successful treatment of the periodontal condition. METHODS: In 1986, a 3.5-year-old Indo-Canadian male was diagnosed with Papillon-Lefèvre syndrome and began periodontal treatment. Initial therapy consisted of debridement every 3 weeks, a 0.12% chlorhexidine mouthrinse, 2 regimens of metronidazole, and oral hygiene instruction for his parents. After 10 months it became apparent that the treatment was having little beneficial effect, since the periodontal destruction continued and teeth 51 and 61 exfoliated. At age 4, all remaining deciduous teeth were extracted and complete dentures inserted for the following 2-year edentulous period; then a 3-month maintenance schedule was maintained. RESULTS: The patient is now 17 years old and all his adult teeth are present with the exception of the third molars. His oral hygiene varies between moderate and good, with his most recent plaque score at 80% effectiveness. There are no probing depths greater than 4 mm, with the exception of the distal of the lower second molars where opercula are present. CONCLUSIONS: Extraction of all the deciduous teeth followed by a period of edentulousness may partially explain the fact that there has been no recurrent attachment loss in the permanent teeth up to age 17. Other explanations are discussed as part of the literature review of Papillon-Lefèvre syndrome.

Adolescent↗